Death: SATOKO finds and corners the real Satoko after manipulating Keiichi Maebara into believing that she's the real Satoko hunting the fake one. SATOKO murders Satoko and then Keiichi murders SATOKO.
Memory lost: Shion Sonozaki murdering her in Meakashi. She will have a vague recollection of being tied to a cross and trapped in a shady basement, but not who did it to her.